Electron Structure

Question 1

Number of electrons in first shell

Answer 1

2

Question 2

Number of electrons in second shell

Answer 2

8

Question 3

Number of electrons in third shell

Answer 3

18

Question 4

Number of electrons in fourth shell

Answer 4

32

Question 5

Orbital

Answer 5

A region that can hold up to two electrons, with opposite spins

Question 6

Shape of s orbital

Answer 6

Spherical, symmetrical around the nucleus

Question 7

Shape of p orbital

Answer 7

3 dimensional dumb-bell shape; centre at nucleus

Question 8

Number of orbitals in an s sub-shell

Answer 8

1 s orbital

Question 9

Number of orbitals in a p sub-shell

Answer 9

3 p orbitals (on x,y and z axis)

Question 10

Number of orbitals in a d sub-shell

Answer 10

5 d orbitals

Question 11

Number of electrons in a full s sub-shell

Answer 11

2

Question 12

Number of electrons in a full p sub-shell

Answer 12

6

Question 13

Number of electrons in a full d sub-shell

Answer 13

10

Question 14

Order of sub-shell energy levels

Answer 14

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p

Question 15

First ionisation energy

Answer 15

Energy required to remove one electron from each atom in one mole of atoms in a gaseous state to form one mole of gaseous 1+ ions

Question 16

Successive ionisation energy

Answer 16

A measure of the energy required to remove each electron in turn, e.g. the second ionisation energy of an element is the energy required to remove one electron from each ion in one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions

Question 17

What are ionisation energies influenced by?

Answer 17

Nuclear charge, electron shielding and distance of the outermost electron from the nucleus